Answer to Question #131339 in Optics for will

Question

A car travels at 50 mph for 2 hours. It then travels another 200 miles at an average of 60 mph. What was the car's average speed for the entire trip?

Answer 1

$Distance= speed\times time$. For the first part of the journey distance will be $d=50mph\times 2hrs= 100miles.$

Total time taken for second part of the journey=$\frac{200}{60}=3.33hrs.$

We know that =$Average speed=\frac{total distance}{total time taken}$. Therefore,

$Total distance= 100miles+200miles= 300miles.$

$Total time taken= 2hrs+3.3hrs=5.3hrs.$

Thus,$Average speed= \frac{300}{5.3}= 56.6mph$